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Cheap flights from Chicago (CHI) to Seattle (BFI)

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0 Children (2~11)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)

How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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Cheap flights from Chicago to Seattle in April , May 2026

29 Apr - 16 May $ 736.00
CHI
Chicago
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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29 Apr - 09 May $ 736.00
CHI
Chicago
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
Pick dates
29 Apr - 01 May $ 768.00
CHI
Chicago
Spirit Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Spirit Airlines
2 STOPS
CHI
Chicago
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Last minute flights from Chicago to Seattle

28 Apr - 30 Apr $ 778.00
CHI
Chicago
Spirit Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Spirit Airlines
2 STOPS
CHI
Chicago
Pick dates
27 Apr - 30 Apr $ 778.00
CHI
Chicago
Spirit Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Spirit Airlines
2 STOPS
CHI
Chicago
Pick dates
20 Apr - 30 Apr $ 796.00
CHI
Chicago
Spirit Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Spirit Airlines
2 STOPS
CHI
Chicago
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One-way flights to Seattle from Chicago

8:58 PM - 2:45 PM
Air Excursions
3 Stops
20h 37m
CHI - BFI
$ 370
Kiwi
Pick dates
8:58 PM - 2:45 PM
Air Excursions
3 Stops
20h 37m
CHI - BFI
$ 380
Kiwi
Pick dates
8:58 PM - 2:45 PM
Air Excursions
3 Stops
20h 37m
CHI - BFI
$ 380
Kiwi
Pick dates

How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)

Related info for your journey
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.